River's Edge

18-year-old Kasia Maier planned to spend her summer studying turtles in the sand prairie, not trudging through fearsome backwaters with her new coworker, Blayne. And when a monster drags Blayne into the Mississippi River, Kasia never expected herself to jump in after him. She saves him, but soon she's discovering the monstrous in other places... including herself.

River's Deep: The River Immortals, Book 2

My name is Kasia Maier. Most girls my age are preparing for college, learning at summer jobs, and trying not to mess up dates. Not me. I'm preparing for life underwater, learning that my voice hypnotizes people, and trying not to kill guys with a kiss. I'm still human… for now. Several things could change that in the next few days.